I found a page on a Audio magnetic amplifier singing Tesla coil in nuts and volts magazine so sharing here
http://nutsvolts.texterity.com/nutsvolt ... pg=68#pg68A idea for us perhaps and might be dreaming but fun to think about these things and experiment .
Using a high voltage spark for a the light behind a nipkow has been done before but not with a magnetic amplifier so long as the AC frequency for the magnetic amp is high enough and so has bandwidth for the video modulating the spark as a light source for a Nipkow should work .
I see hand wound coils for the Audio magnetic amps ,perhaps using 2 audio speaker transformers might be a easier option for experiments .
If i had the skills to make a Audio magnetic amplifier so far not
but if i got one going one day ..a dream would be in doing away with the solid state diodes and replacing them with magnetic diodes such as Teslas magnetic diode or some thing like that would be interesting and keeping it all electric in the way of wires and magnetism .
http://alternative-technologies.org/art ... ctifierII/http://www.linux-host.org/energy/trect.htmhttp://www.alternative-technologies.org ... rectifier/The Ac high frequency for the magnetic amp would be a stepper motor as a generator or similar as in the last few posts ..with the correct pulley ratios you can get many khz maybe without frequency multipliers ..voltage would be no problem i can get 50 to 100 volts ac out of these things depending on speed frequency of the stepper.
On my small recent past experiments i have had not much luck on amplifying audio may be get it one day need to try to know .
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.